Vibrating jaw crushers



Sept.'9, 1969 vmrrs Y ETAL 3,465,976

VIBRATING JAW CRUSHERS Filed June 14, 1967 4 Sheets-Sheet 1 Sept. 9,1969 K. EQVINITSKY ET L VIBRATING JAW CRUSHERS 4 Sheets-Sheet I FiledJune 14, 1967 F IE4 p 1969 K. E. VINITSKY :1 3,465,976

VIBRATING JAW CRUSHERS Filed June 14,- 1967 4 Sheets-Sheet 5 Sept. 9,1969 K. E. VINITSKY ET AL 3,455,975

I VIBRATING JAW CRUSHERS Filed June 14, 1967 4 Sheets-Sheet 4.

United States Patent 3,465,976 VIBRATING JAW CRUSHERS KonstantinEfimovich Vinitsky, Krivoarbatsky pereulok 19, kv. 6, and Igor FomichGoncharevich, Zubovsky bulvar 19, kv. 1, both of Moscow, USSR.

Filed June 14, 1967, Ser. No. 646,100 Int. Cl. B02c l/04, 1/10 U.S. Cl.241-206 4 Claims ABSTRACT OF THE DISCLOSURE The present inventionrelates to devices for crushing friable materials, such as stone, coal,ore and building materials, and more particularly it relates tovibrating jaw crushers.

In prior art vibrating jaw crushers crushing the materials is effectedbetween two movable jaws performing oppositely directed horizontalvibrating motions caused by synchronously operating vibrators.

Said prior art crushers suffer from bulkiness, as well as from greatweight of their supporting frames which necessitates the mounting ofsuch crushers on foundations; the use of massive supporting framescannot be avoided since the forces arising in the course of crushing arefully received by the frames due to hinge linkage of the crushing jawsto the supporting frames.

The above-said disadvantage prohibits the development of comparativelylight weight semi-stationary and mobile designs of vibrating crushers ofwhich modern industries, the mining one in particular, are in greatneed.

Another disadvantage of the known vibrating crushers is that in thelatter the vibrators are fixed directly to the movable jaws which carrycrushing plates and strike with these plates against the material to becrushed.

Since the linkage between the crushing plate, jaw and vibrator is arigid one, all the loads (such as inertia, disturbing and elasticforces, impact pulses etc.) are taken up by the vibrator, the bearingsof the unbalanced shafts being affected by the impact pulses more thanthe other elements of the vibrators, which fact results in the reductionof the service life of the bearings, thus prohibiting the development ofsufiiciently powerful vibrating crushers. Inertia loads may be somewhatreduced by adjusting the vibrating crusher to a near-resonance duty andby reducing the weight of the movable jaws. However, with an increase inthe maximum size of lumps of the material being crushed, there occurs aninevitable increase in the weight of the movable jaws while, on theother hand, the impact pulses prevail among all other loads (when thejaws strike against the lump being crushed).

It is an object of the present invention to eliminate theabove-mentioned disadvantages.

The basic object of the invention is to provide a highly efficient andpowerful foundationless, mobile or semi-stationary, vibrating jawcrusher, wherein the impact pulses would not be transmitted directly tothe vibrators.

Said and other objects of the present invention are accomplished in acrusher of the above-described design by interconnecting the movablejaws from the sides by means of shock absorbers resting against thesupporting frame of the crusher.

It is advisable that each of the shock absorbers be fashioned as asystem of horizontally arranged flat brackets with resilient elementssqueezed therebetween. It is feasible that two of said brackets, i.e.the lower and upper ones, be secured on the side of one of the movablejaws, while the third, i.e. the central one, disposed between the lattertwo, be secured on the side of the second movable jaw, two otherbrackets disposed one between the upper and central ones, and the other,between the central and the lower ones, being interconnected by means ofa resilient element resting against the supporting frame of the crusher.

It is also advisable that each movable jaw be made up of two separateparts interconnected by means of resilient links, one part carrying acrushing plate secured thereon, and the other-a vibrator.

The resilient links of said parts of the movable jaw may be fashioned asadjustable springs secured on threaded pins whose ends are placed inseats provided in the movable jaw parts being connected.

The present invention is further exemplified by the description ofpossible embodiments of the vibrating jaw crusher according to theinvention, reference being had to the accompanying drawings, wherein:

FIGURE 1 schematically shows an embodiment of the vibrating jaw crusheraccording to the present invention (plan view with a partial section);

FIGURE 2 is a section on ABCDEF of FIG. 1;

FIGURE 3 is a section on HK of FIG. 1;

FIGURE 4 is a section on LM of FIG. 1;

FIGURE 5 is a side view of the synchronizing device of the crusher shownin FIG. 1;

FIGURE 6 is a side view of another embodiment of the vibrating jawcrusher according to the present invention; and

FIGURE 7 illustrates the resilient connection of the reacting andcrushing parts of the jaws of the crusher shown in FIG. 6.

The vibrating jaw crusher according to the invention, as shown in FIG.1, has a suporting frame 1, mounted on which are two movable jaws 2 and2 carrying on the inside respective crushing plates 3 and 3', and On theoutsidevibrators 4 and 4' which impart to said jaws 2 and 2' oppositelydirected horizontal vibrating motions.

The crushing jaws 2 and 2' from the sides are interconnected by means ofshock absorbers 5 resting against the supporting frame 1 of the crusher.

Each of the shock absorbers 5 is essentially a system of horizontallyarranged flat brackets 6 (FIG. 2), 7, 8, 9, and 10, squeezed betweenwhich are resilient rubber elements 11 operating under shear stress. Theupper brackets 6 and the lower 7 are secured on the side of therighthand movable jaw 2, while the central bracket 8 disposed betweenthe latter two brackets is secured on the side of the left-hand jaw 2.The brackets 9 and 10 disposed between the brackets 6 and 8, 8 and 7,respectively, are interconnected by an axle 12 (FIG. 3) resting througha resilient element 13 against a brace 14 secured on the supportingframe 1 of the crusher.

In order to provide for necessary rigidity, the brackets 6 and 7 areinterconnected in their middle part by means of a vertical brace 15(FIG. 4), while the free ends of the brackets 9 and 10 are secured to aplate 16 protecting the shock absorbers 5 from being penetrated byparticles of the material being crushed.

Each of the vibrators 4 and 4' (FIG. 2) has unbalance shafts 17 and 18with unbalances 19 and 20.

Said shafts 17 and 18 are connected with an electric motor 21 (FIG. viaa synchronizing device having toothed gears 22 and 23 and flexiblecouplings 24 and 25.

The vibrators 4 and 4' of the left-hand 2 and right-hand 2' jaws areinterconnected by means of a V-belt drive having pulleys 26 (FIGS. 1 and5) and a driving belt 27.

Shown in FIG. 6 is another embodiment of the present vibrating crusherprovided with means for avoiding the transmission of the impact pulsesdirectly to the vibrators 4 and 4'.

Each of the jaws 2 and 2' in the present crusher consists of twoseparate parts, viz., reactive 28 and 28', and crushing 29 and 29,respectively, interconnected by means of resilient links 30.

Secured on the inside, crushing, parts 29 and 29 of the jaws 2 and 2 arethe crushing plates 3 and 3', while on the outside of reacting parts 28and 28', the vibrators 4 and 4' are mounted.

Each resilient link 30 has a spring 31 (FIG. 7) tightly screwed fromboth ends onto threaded pins 32, said pins being rigidly secured in theparts of the jaws 2 and 2 which they interconnect.

In lightweight crushers the vibrating system may be adjusted toeflicient resonance duties with the aid of the resilient links 30.

In larger crushers the resilient links 30 may be fashioned as rubberpacking damping the impacts transmitted from the crushing plates to thevibrators.

The vibrating crusher according to the first embodiment (FIG. 1) of thepresent invention operates as follows.

Upon switching on the electric motor 21, the rotation of its shaft istransmitted via the synchronizing device, i.e. via the toothed gears 22,23 and the flexible couplings 24, 25, as well as via the pulleys 26 andthe driving belt 27, to the unbalanced shafts 17 and 18 of the vibrators4 and 4'. The synchronous rotation of the shafts 17 and 18 istransmitted to the unbalances 19 and 20 which are instrumental indeveloping directed intermittent disturbing forces, under whoseinfluence the movable jaws 2 and 2' start performing oppositely directedhorizontal vibrating motions.

Moving simultaneously with the jaw 2 are the central brackets 8 of theshock absorbers 5 and 5', and with the jaw 2'the upper 6 and lower 7brackets.

Since the movements of the brackets 9 and 10 are equal in range andopposite in direction, the brackets remain at rest. Should, however,vibration of said brackets 9 and 10 occur due to inaccuracies inmanufacture or some other reasons, this vibration will be damped in theresilient elements 13. Thus, the transmission of vibration to thesupporting frame 1 will be reduced to a minimum.

Lumps of the material being crushed are fed by a conveyor (not shown inthe drawings) into the space between the periodically separatingcrushing jaws 2 and 2' which, on their return movement, perform crushingof the material thanks to the impact pulses. The crushed material fallsdown between the separating jaws 2 and 2, wherefrom it is carried awayby the conveyor.

The operation of the vibrating crusher made in accordance with thesecond embodiment (FIG. 6) of the present invention differs from that ofthe crusher described hereinabove in that the vibrators 4- and 4'mounted on the reacting parts 28 and 28 transmit the disturbing forcesonto the crushing parts 29 and 29' of the jaws via the resilient links30, thus permitting the elimination of retransmission of impact pulsesonto the bearings of the vibrators 4 and 4.

We claim:

1. A vibrating jaw crusher, comprising: a supporting frame; two movablejaws mounted on said frame one opposite the other; crushing platessecured on the inner sides of said movable jaws, between which plates afriable material is crushed; synchronously operating vibrators securedon the outer sides of said movable jaws and imparting the latteroppositely directed vibrating motions; shock absorbers interconnectingsaid movable jaws from the sides and resting against said supportingframe of the crusher.

2. A vibrating jaw crusher, as set forth in claim 1, wherein each of theshock absorbers is essentially a system of horizontally arranged flatbrackets between which resilient elements are squeezed, two of thesebrackets (the upper and lower one) being secured on the side of one ofthe above-mentioned movable jaws, whereas the third (central) bracketdisposed between the latter two is secured on the side of the secondmovable jaw, and two other brackets, of which one is disposed betweensaid upper and central ones and the otherbetween the central and lowerones, are interconnected and, through a resilient element, rest againstsaid supporting frame of th crusher.

3. A vibrating jaw crusher, as set forth in claim 2, wherein each ofsaid movable jaws consists of two separate parts interconnected by meansof resilient links, one part carrying said crushing plate securedthereon, and the other said vibrator.

4. A vibrating jaw crusher, as set forth in claim 3, wherein saidresilient links are fashioned as adjustable springs movably secured onthreaded pins whose ends are placed in seats provided in said parts ofthe movable jaws interconnected by said pins.

References Cited UNITED STATES PATENTS 2,652,985 9/1953 Linke '24l2662,866,605 12/1958 Picone 241262 3,211,388 10/1965 Gartner 241-262 X3,414,203 12/1968 Bodine '241202 ROBERT C. RIORDON, Primary Examiner D.G. KELLY, Assistant Examiner US. Cl. X.R. 241-262, 290

